Paper · 2025 · Biodiversity Data Journal

Thesium ebracteatum (Santalaceae) rediscovered in Romania: ecological and biogeographical context

Jan Roleček; Jan Novák; Přemysl Bobek

7
claims
12
verbatim quotes
0
citations
1
research areas
✓
Open access · cc-by

Abstract

Thesium ebracteatum Hayne is an endangered hemiparasitic plant, rare in the south-western part of its range. It is listed in Annex II of the EU Habitats Directive and appears on the national Red Lists of many European countries. In Romania, the species is considered extinct according to the national Red List, with only a few historical records from Transylvania. In June 2025, approximately 100 individuals of T. ebracteatum were discovered near Bălcăuți, Suceava Region, Romania. This represents the first national record of the species in several decades and the first ever from eastern Romania. The species occurred in a stand documented by a vegetation plot, corresponding to the phytosociological association Brachypodio pinnati - Molinietum arundinaceae . The isolated occurrence near Bălcăuți, similar to other peripheral populations in the south-western part of the species’ range, is regarded as relict. This interpretation is further supported by the disjunct occurrence of other rare plant species typical of peri-Carpathian forest-steppe. Historical maps indicate that the site once formed part of an extensive grassland complex known as Horaiț/Horaiza, most of which was converted to arable land during the 19 th and 20 th centuries. For the long-term conservation of T. ebracteatum and other rare species at the site, targeted management is required, including the prevention of further ploughing and the extension of legal protection to all valuable local stands.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 7

Observationobservedoriginal resultmeasured

Claim · model-written summary

About 100 individuals of Thesium ebracteatum were discovered near Bălcăuți, Suceava Region, Romania, in June 2025.

Taxon
Thesium ebracteatum HayneThesium ebracteatume0
Outcome
individuals of T. ebracteatum were discoverede1
Value
approximately 100e1
Setting
Bălcăuți, Suceava Region, Romaniae1

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thesium ebracteatum
Thesium ebracteatum · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Thesium ebracteatum Hayne is an endangered hemiparasitic plant”

✓ located verbatim in the source · abstract, characters 0–62 · show in text ↑
e1

“In June 2025, approximately 100 individuals of T. ebracteatum were discovered near Bălcăuți, Suceava Region, Romania”

✓ located verbatim in the source · abstract, characters 365–481 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The Bălcăuți record is the first national record of Thesium ebracteatum in several decades and the first from eastern Romania.

Taxon
Thesium ebracteatum HayneThesium ebracteatume0
Outcome
first national record of the speciese2
Setting
eastern Romaniae2

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thesium ebracteatum
Thesium ebracteatum · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Thesium ebracteatum Hayne is an endangered hemiparasitic plant”

✓ located verbatim in the source · abstract, characters 0–62 · show in text ↑
e2

“This represents the first national record of the species in several decades and the first ever from eastern Romania”

✓ located verbatim in the source · abstract, characters 483–598 · show in text ↑
Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The isolated Bălcăuți occurrence of Thesium ebracteatum is regarded as a relict population.

Taxon
Thesium ebracteatum HayneThesium ebracteatume0
Outcome
regarded as relicte3
Setting
Bălcăuție3

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thesium ebracteatum
Thesium ebracteatum · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Thesium ebracteatum Hayne is an endangered hemiparasitic plant”

✓ located verbatim in the source · abstract, characters 0–62 · show in text ↑
e3

“The isolated occurrence near Bălcăuți, similar to other peripheral populations in the south-western part of the species’ range, is regarded as relict”

✓ located verbatim in the source · abstract, characters 764–913 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Thesium ebracteatum occurred in a stand corresponding to the phytosociological association Brachypodio pinnati - Molinietum arundinaceae.

Taxon
Thesium ebracteatum HayneThesium ebracteatume0
Outcome
phytosociological association Brachypodio pinnati - Molinietum arundinaceaee4

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thesium ebracteatum
Thesium ebracteatum · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Thesium ebracteatum Hayne is an endangered hemiparasitic plant”

✓ located verbatim in the source · abstract, characters 0–62 · show in text ↑
e4

“The species occurred in a stand documented by a vegetation plot, corresponding to the phytosociological association Brachypodio pinnati - Molinietum arundinaceae”

✓ located verbatim in the source · abstract, characters 600–761 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Most of the extensive grassland complex around the Horaiț/Horaiza site was converted to arable land during the 19th and 20th centuries, according to historical maps.

Taxon
Thesium ebracteatum HayneThesium ebracteatume0
Outcome
most of which was converted to arable lande5
Direction
convertede5
Setting
Horaiț/Horaizae5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thesium ebracteatum
Thesium ebracteatum · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Thesium ebracteatum Hayne is an endangered hemiparasitic plant”

✓ located verbatim in the source · abstract, characters 0–62 · show in text ↑
e5

“Historical maps indicate that the site once formed part of an extensive grassland complex known as Horaiț/Horaiza, most of which was converted to arable land during the 19 th and 20 th centuries”

✓ located verbatim in the source · abstract, characters 1053–1247 · show in text ↑
Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The disjunct occurrence of other rare plant species typical of peri-Carpathian forest-steppe further supports the relict interpretation.

Taxon
other rare plant speciese6
Outcome
disjunct occurrence of other rare plant speciese6

Not reportedDirection

Verbatim

e6

“This interpretation is further supported by the disjunct occurrence of other rare plant species typical of peri-Carpathian forest-steppe”

✓ located verbatim in the source · abstract, characters 915–1051 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Targeted management is recommended for the site, including prevention of further ploughing and legal protection of all valuable local stands.

Taxon
T. ebracteatumThesium ebracteatume7
Outcome
prevention of further ploughing and the extension of legal protection to all valuable local standse7

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Thesium ebracteatum
Thesium ebracteatum · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e7

“For the long-term conservation of T. ebracteatum and other rare species at the site, targeted management is required, including the prevention of further ploughing and the extension of legal protection to all valuable local stands”

✓ located verbatim in the source · abstract, characters 1249–1479 · show in text ↑